Selective wireless-telegraph apparatus.



F. G. SARGENT.

I SELECTWE WIRELESS TELEGRAPH APPARATUS.

Patented Feb. 8, 19 16.

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APPLICATION FILED OCT. 31 1914.

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' F. e. SARGENTQ SELECTWE WIRELESS TELEGRAPH APPARATUS.

APPLICATION FILED OCT. 3, 1914- Patented Feb. 8, 1916.

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Application fi1edbctober3, 1914. Serial Nof864 .,716;

To aZZ ohom honey concern:

Be it known that I, FREDEISIGK G. SAR- GENT, a citizen of the United States, resid-v ing at l/Nes'tford, in thercounty of Middlesex and State 'of Massachusetts, have in vented a new and useful Selective Wireless- Telegraph Apparatus, of which the. follow- 'ing is a specification.

"This invention relates to improvements overmy prior inventions set forth in Letters Patent of the vUnited States Nos.

1,091,788 and 1,102,442, patented respec tively March 31st and July 7th, 1914:. The principal objects of the present invention" are to provide an apparatus for selective radio telegraphing in which the principle-f the dial and indicator is used, one rotatable with respect to the other, but

' in w ch there need'be no'characterson the acters located independently of the dial,. such corresponding. characters being in some dial; to provide a construction in which the characters sent or received can be lndicated by the illumination of corresponding charcases arranged on the keys of a typewriter which can be used in sending or for recording messages received; also to provide for receivin by telephone; to provide a construc- 'tion in which with the same rate of rotation Reference is to be had to the accompanying drawings, in which Figure of dial and indicator showing the electrical connections diagrammatically; Fig. 2 is a sectional view showing one way in which the contacts can be made by the dial and indicator; Fig. 3 is an elevation of one of the lamps for illumii'lating the characters shown as constituting a 1 is a plan of the preferred form key of a typewriter andshowing its electrical connections; Fig. 4 is Specification of Letters Patent. Patgnted F b. 8, 1916; I.

a plan of the hair-spring regulating device;

5 is a plan of a portion of a dial and indicator showing a modified construction,

and Fig.6 is aplan ofa portion of a dial showing another modification.

, In the form of .the invention shown the I first four figures, the apparatus'comprises a selector A, an external series of characters B,

a sending circuit (La receiving circuit D,

and an aerial E. This selector A is similar to the selector shown in my above mentioned patents, but the indicator connected with it- 1s shown as having four conductinghands I 1,'- 1, 1, 1'. IIl'thlS case,letit be'assumed that.

the dial 2 is stationary and the indicator rotary. The dial is provided with a series of equally spaced contacts 3 shown in'Fig; 2 which are adapted to be engaged by springs a on the ends of the indicator hands. These contacts are nearly flush with the surface of the dial plate 2 which is made of hardrubber or-other insulating material. The' distance between the first and the second;

hands'is equal to ninety I degrees, plus a quarter of the distance'between two, of the contacts 3. 0nd and third and the third and fourth is The distance between the secthe same, leaving the distance between the I .fourthand first hands equal to ninety. de grees. less three-quarters of the distance between two of the contacts 3. Therefore, if one hand 1 is on a contact'as shown Fig. 1, the next one in advance will be a quarter away in advance of, another, contact, the I next one'beyond it, the third hand, will be half-way between two contacts, and the fourth hand will be three-quarters of the way. Thus when the indicator advances. a .quarter of a space the fourth hand will come into' engagement with a contact, the

first hand will leave its contact, and the other two will advance ready to make their contacts in order as will be obvious. The

number of spaces, divisions or contacts on the dial is a multiple of the number ofhands 1.

The dial is not shown as provided with characters in Fig. 1, as that is not necessary according to the present invention. As was the case in my prior patents, each of the contacts 3 is connected'with a battery 5 through wires 6, only a few of which are shown. This battery, as well ,as the hands 1. is connected with the metallic case of the selector A.

- As each contact is made in succession, one of these branch circuits from the case of the instrument through the battery 5, is completed. They, of course, can be made to opcrate a drop or the like to indicate the position or place of the hand at that time and annunciate the character without noting the same on the face of the selector. Another way of annunciating the relative position of the dial and indicator, is to use a phono-. graphic device for calling out the signal. However, I prefer to use a small electric lamp 7-mounted in the top otleach key 8 as indicated diagrammatically at B in 1. The top of the key is of glass with letters and numerals as desired on the glass or under it. In this case six of the keys are indicated in Fig.1. In this way it is not neces to watch any letters on the dial or the positions of the hands. As each character comes into electrical contact through one, ot' the hands 1 it is lighted up and more readily distinguished than when on the dial. These branch circuits 6 are each connected through a. lamp filament 7 to a key rod 9 connected with'the other terminal of the lamp iila ment. These key rods in their normal positions are connected with the battery through wires 10 and a conductor '11. When it is dcsired to send for example the letter A that key 8 is pressed down and a contact 12 on that rod 9 breaks the contact with the wire 10 and later comes into contact with a, spring 13. This spring is connected through a wire 1a with a circuit 15 which in series with the conductor 11 connected. with he battery. In order to commence to send, a switch 16 is closed. to complete this circuit through an electro-magnet 17. This key 8 is kept depressed until the contact is made by the indicator hand and then the circuit is completed over the wire (3, spring 18 (which is a part of each branch 6), lamp 7, rod 9, spring 13, ,wire 14, circuit 15, magnet 17, conductor 11, battery 5, and the case of the instrument. Nowin a. manner similar to that set forth in my above mentioned patents this excites the magnet 17 which draws down a lever 19 and makes contact to-comnlete a circuit 20. This circuit is provided with a battery 21 and a primary 22. The

secondary 23 of the same is excited as usual, and a switch 2% therein, being closed to the left as shown in Fig. l, a signal is delivered through the aerial. E.

For the purpose of receiving, the switch 2-1 is thrown overt-o make a-contacr and a signal received. by the aerial ll passes through the tuning coil 20 which is connect ed with the ground at 27-. A variable condenser 28 is shown in circuit with telephone 29 and detector 30. I prefer that each of the keys 8 shall also serve as typewriter and for that purpose the rod 9 shown in' Fig. 3 is connected to operate a lever 31 having a type face Now when the operator at the receiving station hears signal through thetelephone that synchronizes with the lighting of a lamp he presses that key at his station. This typewritcs the letter called. This is done for each signal until the message is received. In sending the message is also typewritten as sent, preferably but not necessarily.

It will be understood that as far as the invention has been described above the relative rotation of the dial and indicator can be provided for in any ordinary 'ay as for example by an ordinary clock train in the selector case. However, certain improvements by which this rotation is provided are shown herein. It will be understood. of course, that although I have shown this mechanism arranged to operate the selector or indicator hands, the dial being stationary, the same principles would be carried out if used to rotate the dial with the hands stationary or to rotate both at ditlercnt speeds or in diflerent directioiis. In this casethe clock-work for operating the hands is shown separate from the selector itself.

An escapen :Tlt T isshown having an escapenient wheel 4&1; which is regulatml by an oscillating crutch 42. Preferably one pallet of the crutcl'l 49;, as it). is insulated from the remainder ol the crutch. The other end 4-?) oil? the crotch is of metal and connected through an arm 4-1 with a circuit 45 in which is a battery 3 and an electro-nnignet 49. Both ends of the crutch an be electrically connected it desired. in which case the operatien takes place twice for each complete oscillation of the crutch.

The current from the cell 39 completed through the case of the instrument and the shaft on which the escapenient wheel 4-1- is mounted only whenever the end 43 of the pallet in contact with the escapement wheel. In this way, it being understood that the escapenient wheel is operated by any usual clock mechanism, an intermittent currentis provided forintermittently exciting the electro-1nagnet is. This operates a lever 1 .7 which constitutes a ratchet consisting of the end of the lever and a pawl held. in position by a spring 51. This ratchet operates aratchet wheel 53 to which, in the present instance, the arms 1 are secured, so that they move by a s. day-step motion over the keys a dot and dash stationary dial. A restraining pawl 48 is shown for an obvious purpose.

As I have shown the indicator as having and of longer duration by theme of this mechanism, as practically all friction is eliminated in the clock work. An ordinary stop motion, such as is used on a stop-watch can be employed in connection with it but this is not shown herein. Instead of connecting the battery directly tothe case I sometimes prefer to connect it to the ratchet wheel 53, and only when it is time to make a contact. For this purpose I provide on pposite sides of the lever 47, two adjustable ccntact screws 46 and 55. These are adapted tube moved into position to be engaged by the lever as it swings on its pivot. These are connected. with two conductors 56 and 57.

, which are provided with terminals 58 and 59 respectively.

the battery terminal. The switch 60 also can connect the battery directly with the case.

IVhen sending or receiving this connect-ion through the lever 47 only when that is operative is advantageous to help synchronize.

The clock work is preferably ,p'roided with a hair spring 68 for regulating it con nested atone end to a'spindle 66 and at the other to anoscillating Wheel 67 as in ordinary clock work (Fig. 4). This spindle is provided with a projecting arm 69 pressed by a spring 71 up against an adjusting screw 70 which is mounted on 0. lug 72 on the easing. the use of this adjusting screw the regulatin spring (:8 will regulate the clock work so as to vmake the same synchronize with any selector.

Fig. 5 shows a modification. In this case the hands 1 are also revolved .by clock .work in the casing and are attached to an escapernent wheel 61. This is regulated by a crutch 62 preferably held in position by a spring and controlled by an electro-niagnet connected with a circuit similar to the circuit l5 and operating in a similar way. In this case also the hands 1 are shown as connected with contacts 35 by means of a spring in a plane transverse to its direction of motion and adapted to contact with them and to yield to permit it to pass.

of Contact is shown, in which each arm 1 Each of these terminals is, adapted to be connected by a switch 60 with In the form shown. in Fig. 6 another form,

also has a yielding terminal38 for engaging metallic contacts 37 separated from each other by an insulating circle 36. Although I have illustrated and describe only a few forms in which the invent on can be embodied, I am aware of the fact that it can be carried out in other forms without departing from the spirit of the invention as expressed in the claims. Therefore, I do not wish .to be limited to these particular forms of the mechanism, but

lVhat I do claim is l.- In an apparatus for selective signaling, the combination of two members, means for moving oneof said members relatively to the other, a series of contacts adapted to be closed and opened in order during such motion, means independent of said members for annunciating the relative position of said members as each contact is made and means for automatically sending a] uniform radio signal at each annunciation.

In an apparatus for" selective signaling, the combination of two members, one having a series of spaces thereon with which the other member is adapted to register, means for moving one of said members relatively to the other, a series of contacts corresponding to said spaces adapted to be closed and opened in order during such motion, electrical means independent of said members for annunciating the relative positions of said members and the space which is regis tered as each contact is made and means in series with all of said electrical means for sending a uniform signal by radio signaling means upon the making of each of said contacts.

3. In an apparatus for selective signaling, the combination with a dial and indicator rotatable relatively to each other and having a series of contacts adapted to. be con nectedup in order during the rotation of the dial or indicator, a series of electric lamps, one connected with each of said contacts a character adjacent to each oi said lamps and ada pted to be illuminated thereby, and means in series with'all of said lamps where by a radio signal will be sent whenever any one of said contacts is closed and the lamp illuminated.

=1. In an apparatus for selective signaling, the combination with two members rotatable relatively to each other and having a series of contacts adapted to be connected up in order during 'the rotation of the rotatable member, a branch circuit connected with each of said contacts, a source of electric power connected with all of said contacts, a series of electric lamps, one connected with each of said branch circuits, means whereby said electric lamps can be illuminated as said branch circuits are closed by the rotation of the rotatable member, a character adjacent u no to each of said lamps and adapted to be illuminated thereby, and means operated by said source of power whereby a radio signal will be sent whenever any one of said branch circuits is closed and the lamp illuminated.

In an apparatus for selective signaling the ronibii'iationwith two members relalively rotatable a series of contacts associated therewith and adapted to be closed in order during the rotation thereof, a branch circuit connected with each 01'' said contacts, each branch circuit being normally open at another point a push-button for ch of said brain-h circuits baring an electric lamp thereon electruially connected witn its branch circuit and means connected with earh pusl'i-builon for closing one or the branch circuits at said other pointwhen the pus uztton is depre ed.

(l. in an aguparatus tor selective signaling,

the combination with two members relatively i'i'nii'able, a series of contacts associwiih and adapted to be clo i the rotation th of, a branch d contacts, luumn for each of saidi'uraneh cirhaving an electric lamp thereon connecln-l with the branch circuit means eonll(f(.l "(,l with each push button for closing" one of the branch circuits when the push button is d or ed, and a trpewriterlever con- IECi'fllil uh each push button to be operated upon the depre sion thereof.

'7. in an apparatus for selective sigiuiling the combination with a dial and indicator rotetablen a series o ccnta i'r; as-

-rewitli and adap .i'l

rotation the luv-2o: a inectcd with each oi said on for each of sum means eminected with each closing one ol" the branch .Lhe push button is de 'iressed, er ilQYUU-CUHIlGCtUQi with each to be operated upon the (replies zrriiso t.

system. the combination of i;\V()l11LU1iI) i concentricaEly arranged, one rclyit-ixlily rcla" tiv in, othmr, one or said uieu'ibers harf ii i i 1 i u n 1 o, occinai ccneac cquany "We. (llVn into a f'liercol oi spaces. the other s hex-inn number 0 nce plur:

4cm" e fracti on rcon-tee; between. the

" with V er-Jntial d oi" the other hands distal i circuzn hands of that pair being equal to the angle covered by one of said series of spaces less the major portion of a space between two of said contacts, and a series of branch circuits each one connected with. one of said contacts.

9. As an article of manufacture, a selector for the purpose described comprising two concentric members, one rotatable on the center of the otl'ier one of said members having each quarter thereof divided into an equal number of equal divisions, the other of said members having liour hands, the circumferential distance between the ends of each pair of adjacent hands except one being equal to one of said quarters in addition to one quarter of the space occupied by one of said divisions, and the cireuuiferential dis tance between the ends of the other two hands being equal tonne of said quarters less three-quarters oi the distance covered by one of said divisions.

10. As an article of manufacture, a selector for the purpose describcijl comprising two concentric elements, one rotatable with respect to the other on the center thereof, one of said elements being divided circunr i erentially into a plurality o'l:- series of equal dii 'sions and the other of said elements having a number of hands equal. to the number of said series, he angular distance between two adjacent hands being less than the sum of the angular distances covered by said divisions of one series, and the angular distances between each other two adjacent lightly niori by t= cries.

ll, [isanartieleof manufacture,a selector for the pin described comprising two concentric elements one rotatable on a center relative to the other one of said elements having a series of equally spaced divisions arranged in a circle and the other having a plurality oi hands, the circum' ciential distance between each two adjacent hands being slightly more or less than a multiple of the space covered by a dirlsioin and the angle between two oi seid hands being greater than the angle between. am'ither pair of article of nninufacture, a so bci 7 one rotal his with respect to 1 :d n'n nbc s having aplusci or equally spaced divisions and the othezg a, plurality of role mil liainlsat ted to indicate said and equal in nun'iber to the numanees beach of the an exact the g irpose described comprising 1,17o,eso

register with difierent parts of the respective series of divisions which they indicate.

13. In a device of the character described, the combination of a relatively rotatable dial and indicator, an escapement Wheel and an escapement crutch, a lever adapted to be controlled by said crutch, and means connected with said lever for causing a relative step-by-step rotation between the dial and indicator, With a series of circuits each adapted to closed at one point during Copies of this patent may he obtained for said rotation, and means for connecting all of said circuits with one of the relatively rotary members intermittently When each step of the rotation is made. I

In testimony whereof Ihav hereunto set 7 my hand, in the presence of two subscribing Witnesses.

FREDERICK G. SARGENT.

Witnesses: v

HEPHUBAH SARGENT,

WILLIAM F. SARGENT.

five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

